Siemens PLC how to make DB as a source file - Database & Sql Blog Articles

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After opening the DB block, you'll find a 'Customize' option under the menu. From there, you can access the pop-up window where you’ll see a button to generate the source file.

Once generated, the source files are stored in the 'Sources' folder. You can open these files in your preferred text editor or IDE, make changes, and recompile them as needed.

These source files can also be exported into AWL format, which is compatible with tools like Notepad or Excel. This allows for easy copying, editing, and even re-importing back into the system under the 'Sources' section.

You can also directly use SCLsource or STLsource to create a DB. If you already have an existing DB, you can generate a source file by navigating to "File" > "Generate Source".

This approach offers great flexibility—variables within the DB can be copied to a .txt or .doc file for editing, making it much easier to manage and modify data when needed.

For example, here's a sample SCL source code for DB1:

DATA_BLOCK DB1
//
// Block Comment...
//
STRUCT
Tag01: REAL; // Pressure
Tag02: INT; // Temperature
Tag03: BOOL; // High Limit Alarm
Tag04: WORD; // IW
END_STRUCT
BEGIN
Tag01 := 0.0;
Tag02 := 2;
Tag03 := FALSE;
Tag04 := W#16#0;
END_DATA_BLOCK

This method provides better control over your data blocks and makes it more efficient to work with complex systems. Whether you're debugging, modifying, or just organizing your project, having access to the source files is essential for smooth development and maintenance.